What improvements does the UA874US antenna offer over the UA870USTV antenna?
Introduced in May 2012, the UA874US directional antenna has the following improvements:
Switchable RF Signal Gain: +12 dB, +6 dB, 0 dB, -6 dB
RF Overload LED: -5dBm illumination threshold
NOTE: The UA874US is a receiving antenna only. It cannot be used as a PSM transmitting antenna.
Other characteristics of the UA874US:
Connector Type: BNC Female
Impedance: 50 Ohms
Power Requirement: 10 to 15 V DC bias from coaxial connection, 75 mA
NOTE: Bias is always required, even with the 0 dB or- 6dB gain setting.
Reception Pattern: 70 degrees
Third-order Intercept Point: >30 dBm
Antenna Gain (On Axis) : 7.5 dBi
Dimensions: 316 mm x 359 mm x 36 mm (H x W x D)
Weight: 317 g (11.2 oz)
Update: As of July 2012, inventory of of the UA870 antenna has been depleted. If an existing UA870 needs replacement, set the gain on the new UA874US to within 3 dB of the replaced UA870. UA870 gain settings were +3 dB and +10 dB.